Vertical intersecting lightweight steel frame

ABSTRACT

A vertical intersecting lightweight steel frame composes of several main frames and side frames, which are connected with each other vertically. A first oblique fold is formed on two sides of the main frame and a protrusion is on the bottom of the side frame. The angle of the first oblique fold on both side of the indention of the main frame is less than 45 degree, a second oblique fold above the first oblique fold with angle of 45 degree. The angle of the protrusion of the side frame is also 45 degree. The whole structure is stronger and easier to assemble, the darken area of the vertically connected between the main frame and side frame is kept undisclosed.

BACKGROUND OF THE INVENTION

[0001] I. Field of the Invention

[0002] This invention relates generally to a vertical intersectinglightweight steel frame and, more specifically, to a verticalintersecting lightweight steel frame composes of several main frames andside frames, both frames have a elongated groove on the bottom. On themid portion of the main frame has a plurality numbers of joint slots. Afirst oblique fold is formed vertically under the joint slot. Aninserting tongue is on both end of the side frame. A protrusion isstretched out from the flap of the side frame, the angle of the firstoblique fold on both side of the indention of the main frame is lessthan 45 degree, a second oblique fold above the first oblique fold withangle of 45 degree. The angle of the protrusion of the side frame isalso 45 degree. Such structure makes the protrusion of the side frame tomatch and attach firmly into the second oblique fold of the main frame,the whole structure is stronger and easier to assemble, the darken areaof the vertically connected between the main frame and side frame iskept undisclosed.

[0003] II. Description of the Prior Art

[0004] Heretofore, it is known most of the ceilings of residentialhouses or offices are made of metal cranes to form a lightweight steelframes, and fill the empty spaces with plastic, wood or metal plates.

[0005] The known prior art, as shown in FIG. 5, is formed with aplurality numbers of main frame a and side frame b, main frame a andside frame b are made of metal cranes and pressed into I shape. On thebottom the main and side frames have flap a1, b1 respectively andstretching out and form elongated groove a2, b2. In the mid portion ofthe main frame has a plurality numbers of joint slot a3, beneath thejoint slot a3 has an indentation a4 vertically to the elongated groovea2. An oblique fold a5 is on the front of the indentation a4 of the mainframe a. On both end of the side frame b are inserting tongue b3, onboth end of flap b1 of side frame b are protrusion b4. The insertingtongue b3 of the side frame b inserts into joint slot a3 of the mainframe, the protrusion b4 at end of the flap b1 under the side frame bvertically fastens to the elongated groove a5 of the main frame a. Sucharrangement can make the elongated groove b2 of the side frame bconnects vertically to the elongated groove a2 of the main frame a.Repeat the connection can extend the frame structure covers the wholeceiling.

[0006] The elongated groove a2 of the main frame a and b2 of the sideframe b, and the oblique fold a5 of main frame are painted in dark colorto emphasize the connection lines. The oblique fold a5 on both ends ofthe elongated groove a4 of the main frame a are bent from flap a1, thearrangement will weaken the indentation a4 of the main frame a, thewhole structure might tend to twist and unstable.

[0007] The indention a4 of the main frame a is pressed out from the mainframe a, therefore the structure around the indention a4 might tend tobe not so strong and twisted easily. After the protrusion b4 of the sideframe b attaches to the oblique fold a5 on the indention a4 of the mainframe a, the protrusion a4 of the side frame might be off the alignment,the sharp edge of the protrusion a4 might cause injury during assembly.

[0008] The elongated groove b4 beneath the inserting tongue b3 of theside frame b connect to the oblique fold a5 of the main frame a, theindentation a4 of the main frame a is twisted easily after assembly.Since the oblique fold a5 of the main frame a are painted dark,therefore the twist might cause the protrusion b4 of the side frame bcan not cover the oblique fold a5 of the main frame a completely; theoblique fold a5 of the main frame a will expose the darken area.

SUMMARY OF THE INVENTION

[0009] It is therefore a primary object of the invention to provide avertical intersecting lightweight steel frame that has a second obliquefold above the first oblique fold, such scheme can provide a strongerstructure after the side frames are mounted on the main frame.

[0010] It is another objective of this invention to provide a verticalintersecting lightweight steel frame that a second oblique fold is abovethe first oblique fold of the main frame. Such arrangement can cover thecross section of the main frame and the side frame properly to avoid thedarken area from exposure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accomplishment of the above-mentioned object of the presentinvention will become apparent from the following description and itsaccompanying drawings which disclose illustrative an embodiment of thepresent invention, and are as follows:

[0012]FIG. 1 is a perspective view of the present invention;

[0013]FIG. 2 is a cross section view of the present invention;

[0014]FIG. 3 is a bottom view of the present invention;

[0015]FIG. 4 is another cross section view of the present invention;

[0016]FIG. 5 is a front view of a prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Referring to FIG. 1, FIG. 2 and FIG. 3, the present invention iscomposed of a plurality numbers of main frame 1 and side frame 2. Mainframe 1 and side frame 2 are made of metal crane and pressed into Ishape, flap 11 and flap 21 are on the both sides of the bottom of themain frame 1 and side frame 2. The pairs of flap 11 and flap 21 formelongated groove 12 and 22 on the center bottom of the framesrespectively. A plurality numbers of joint slot 13 are on the mid of themain frame 1. A first oblique fold 15 is formed vertically under thejoint slot 13. An insertion tongue 23 is on each of both end of the sideframe 2, a protrusion 24 is on the end of the flap 21 on the bottom ofthe side frame 2. By inserting the insert tongue 23 of the side frame 2into the joint slot 13 of the main frame 1, fasten the protrusion 24 ofthe flap 21 beneath the side frame 2 to the first oblique fold 15 of theflap 11 of the main frame 1, make the elongate groove 22 of the sideframe 2 connect vertically with the elongate groove 12 of the main frame1. Repeat the connection can extend the frame structure cover the wholeceiling.

[0018] The angle of the first oblique fold 15 of the main frame 1 isless than 45 degree, the angle of the second oblique fold 16 above thefirst oblique fold 15 is 45 degree, the angle of the protrusion 24 ofthe side frame 2 is 45 degree, therefore the protrusion 24 of the sideframe 2 can be firmly inserted into the second oblique fold 16 of themain frame 1.

[0019] By above description, the structure of the second oblique fold 16must be strengthened to avoid twist condition after assembly. Theprotrusion 24 of the side frame 2 must be placed flat on the secondoblique fold 16 of the main frame 1 to avoid injury during construction.

[0020] The elongated groove 12 and the first oblique fold 15 of the mainframe 1 and the elongated groove 22 of the side frame 2 should bepainted dark, this is to assure the construction task is done well ornot. While two inserting tongue 23 of two side frame 2 are inserted intothe joint slot 13 of a main frame 1, the protrusion 24 of the side frame2 inserts into the second oblique fold 16 of the main frame 1, matchesand covers the first oblique fold 15 completely.

[0021] The construction is done well or not can be inspected easily byviewing whether there is dark line or spot appears.

[0022] Referring to FIG. 4, the pairs of flap 11 and flap 21 of the mainframe 1 and side frame 2 form elongated groove 12 and 22 on the centerbottom respectively, the elongated groove 12 and 22 are bent further toform folded part 17 and 25; an indentation 14 is right beneath the jointslot 13, the angle of the first oblique fold 15 of the indentation 14 ofthe main frame 1 is less than 45 degree, the angle of the second obliquefold 16 above the first oblique fold 15 is 45 degree. When the insertingtongue 23 of the side frame is in the joint slot 13 of the mainframe 1,the folded part 25 of the side frame 2 can be inside the indentation 14of the main frame 1, the protrusion 24 of the side frame 2 can also befixed into the second oblique fold 16 of the main frame 1.

[0023] While a preferred embodiment of the invention has been shown anddescribed in detail, it will be readily understood and appreciated thatnumerous omissions, changes and additions may be made without departingfrom the spirit and scope of the invention.

What is claimed is:
 1. An vertical intersecting lightweight steel framecomprising: a plurality numbers of main frame and side frame; flaps onthe both sides of the bottom of said main frame and said side frame,pairs of said flaps form elongated groove on the center bottom of saidmain frame and said side frame respectively; a plurality numbers ofjoint slot on the mid of said main frame; a first oblique fold beingformed vertically under said joint slot, the angle of said first obliquefold is less than 45 degree; an insertion tongue on each of both end ofthe said side frame; a protrusion on the end of said flap, the angle ofsaid protrusion is 45 degree; a second oblique fold being above saidfirst oblique fold, the angle of said second oblique is 45 degree, saidprotrusion of said side frame can match and attach firmly with saidsecond oblique fold.
 2. The vertical intersecting lightweight steelframe recited in claim 1, wherein said flaps are bent inward to form afolded part inside said elongated groove.